A method displays a representation of the tip of a medical device located within a body region of interest of the body of a patient, on an image of the body region of interest, the image being acquired by an image detector of a moving imager. The current detecting portion detects the value of the current passing through the process member when a voltage is applied to the process member, and the memory stores information for discriminating whether or not the process member is recyclable on the basis of the detected value of the current. Then, the API components are set to use a pull paradigm, and all masterslave functionality is removed.